Abstract: Modern design technology is used to perform structural design and strength calculation of SWL550 type cross shaft universal coupling. The load boundary conditions of important parts are obtained by using of the mechanical analysis of cross shaft universal coupling. The models of important parts are built based on CATIA, CATIA finite element analysis module is applied to perform finite element analysis of the important parts. Von Mises stresses of the dangerous sections are basically coincident with theoretical calculated values. Replacing the traditional physical coupling experiments with digital models, it simplifies design process of shaft coupling to a large extent.

Key words: mechanical design and theory, digital model, CATIA, cross shaft universal coupling